Mercy
Etymology
From Latin "merces" (wages, pay, reward, price) — the surprising root is commercial. In Church Latin "merced-" shifted to mean the heavenly reward earned by showing pity, and thence "pity, favor" itself; French "merci" (thanks, mercy) preserves the turn. So the word for compassionate pardon grew, oddly, from the word for payment.
noun · /MUR-see/
Compassionate restraint shown toward someone in one’s power — withholding a deserved punishment or harm.
What it names
Reach for it to name the choice not to inflict what you are entitled to inflict, given out of pity rather than obligation.
Example
The judge showed mercy, suspending the sentence for a first offense committed out of desperation.
Related idea
Clemency is mercy exercised by an authority in a formal or legal setting — a governor’s clemency; mercy is the broader human quality. Grace goes beyond mercy: mercy spares a deserved harm, while grace grants an undeserved good.